Broken stud remover



a Oct. 1, 1946. sc A 2,408,450

BROKEN STUD REMOVER Filed March 24, 1944 Patented Oct; 1, 1946.

UNITED STATES PATENT OFFICE BROKEN STUD REMOVER Raymond D. Schrader,Peoria, 111., assignor to V. Ray Van Wey, Pekin, Ill.

Application'March 24, 1944, Serial No. 527,983

1 Claim.

1 The present invention relates to new and useful improvements forremoving broken studs from engine blocks and other places where the boltor stud has been broken off below the surface of the block.

An important object of the present invention is to provide ascrew-threaded member having a bit formation at its lower end andadapted to bite into the end of the broken stud and also to pro: videmeans for rigidly supporting the screw threaded member While the same isengaging the broken stud and while the screw threaded member and studare being removed.

A further object is to provide a device of this character of simple andpractical construction,v

which is eflicient and reliable in performance, relatively inexpensiveto manufacture, easy to operate and otherwise well adaptedfor thepurposes for which the same is intended.

Other objects and advantages reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawing forming part hereof, wherein likenumerals refer to like parts throughout and in which Figure 1 is afragmentary vertical sectional view of an engine block showing the toolin position for removing a broken studtherefrom and with parts of thetool shown in section,

Figure 2 is a top plan view,

Figure 3 is a perspective view of one of the spacing members, and

Figure 4 is an end elevational view of the broken stud removing member.

Referring now to the drawing in detail Wherein for the purpose ofillustration I have disclosed a preferred embodiment of the invention,

"the numeral 5 designates an engine block having the threaded tap orbolt holes 6 therein for securing the engine head (not shown) inposition. The numeral 1 represents a stud or bolt which has been brokenoff in one of the bolt holes 6.

In carrying out my invention bolts 8 are threaded in the opening 6 atopposite sides of the broken stud I and positioned on the bolt andresting on the top of the engine-block are spacing spools 9 on which aresupported the ends of a bridge member II], the bridge member havingslots II in its end portion for adjustably receiving the bolts 8 and thebridge member is secured in a fixed position by the head of the bolt.

The bridge member is also formed with a central threaded opening l2adapted to receive an internally and externally threaded sleeve l3having a hexagonal head I4 at its upper end for re- Sleeve I3, andthereby augment the latters re-' .sistance to pressure.

The lower end of the screw I5 is formed with a head l8 adapted to biteinto the top of the broken stud and to firmly engage the broken stud toremove the latter from the bolt holes 6 by a retracting movement of thesleeve 13.

It will also be understood that the screw l5 and sleeve l3 may beconstructed of various sizes for use in extracting or removing varioussized broken studs.

It will be apparent that the device of the present invention may beemployed efiectively on any broken ofi stud regardless of the pitch ofthe threads thereon. Likewise, it is effective for the removal of anybroken ofi. stud irrespective of whether such stud be flush with theplane surface of the block, or countersunk in the block, or with its endprotruding from the block, and without requiring any prior drilling orlike action thereon. Furthermore, it is obvious that this device may beused for the insertion of bolts or screws into position in blocks wherethe conventional means for such positioning can not be employed.

It is believed the details of construction, operation and advantages ofthe device will be readily understood Ifrom'the foregoing withoutfurther detailed explanation.

Having thus described the invention, What I claim is: l

A broken stud remover comprising a bridge member, slots in each endofsaid bridge member, bolts positioned in said slots and adapted forsecuring said bridge member to the work at opposite sides of a brokenstud to be removed from said work, removable spacing members on thebolts for spacing said bridge member above the work, a threaded openingin said bridge member intermediate its ends, an internally and ex-Mounted in

